Filter



May 22, 1,951 F. J. FETTE 2,553,567

FILTER n Filed DGO. 5, 1945 T. JEHE @w amr Patented May 22, 1951 alsFILTER Frank J. Fette, Tampa, Fla.; Joseph F. Fette executor of saidFrank J. Fette, deceased Application December 5, 1945, Serial No.633,016 1 Claim. (C1. "21o-167) moved from the liquid and expelled fromthe apparatus.

The primary object of the invention is to provide a filter to removefrom the wort of beer all solids including molds, before the wort entersthe cooker.

' Another object of the invention is to provide a filter in which thefilter elements are easily removable for cleaning'or replacement.

A further objectV of the invention is the provision of a fabric filterelement having metallic reinforcements to resist outward pressure.

In the preferred embodiment of the invention selected for the purpose ofillustration, Figure 1 is a central, vertical section through the filterwith parts in elevation and parts broken away; Fig. 2 is a horizontal,transverse section on the line II--II of Fig. l; Fig. 3 is a plan viewof the pump with the surrounding plate in section; Fig. 4 is afragmentary vertical section on the plane indicated by the line IV-IV ofFig. 3; Fig. 5 is a similar section on the plane indicated by the lineV-V of Fig. 3; Fig. 6 is a fragmentary section on a larger scale thanthat of Figs. 1 to 5'of a group of rings in the lter assembly; Fig. 7 isa modification and Fig. 8 a still further modication of the structureshown in Fig. 6.

A cylindrical chamber I has a base 2 and a top 3. In the top, is aninlet opening 1. opening into the central portion of the chamber. Anoutlet opening 5 is at the lower portion of the wall of the chamber I.Spaced inwardly fromthe chamber wall is a cylindrical, perforated, metalshell S withinwhich is an assembly of metal rings 1 and 8. Inthepreferred form shown in Figs. 1 and 6, a fabric 9 is formed as a tube oropen-ended bag of an internal diameter to receive the rings 1. After aring 1 has been set inside of the tube, a ring 8 is slipped over theoutsideof the tube into a position closely adjacent to the first ring,and a second ring 1 Vis then slipped inside close to thering 8 and soon, with the rings alternating inside and outside of the fabric, withlayers of fabric between the adjacent rings.

Preferably, the rings 1 have an inside radius smaller than that of therings 8 by an amount equal to the thickness of the fabric, so that whenthe assembly is completed, the exposed inner surfaces of theY fabric 9are in the same cylin drical surface with the inner surfaces of therings 1.

The outside of the assembly may similarly be made even at all points bymaking the outside radius of the rings 8 greater than that of the rings1 by a, thickness of the fabric, as shown in Fig. y6. I

As a modification, each of the rings 8 may have a complete, annular,fabric covering I0 held by an outside seam II, as seen in Fig. 7, theintermediaterings 'I being left uncovered.

In the further modication illustrated in Fig. 8, a gasket I2 of fabricof any desired thickness may be inserted between rings 1 and 8,preferably all rings being of equal inner diameters, that is all of thesize of T or all of size i3, none of the rings being covered. Obviouslyall the rings could be of the covered type as 8 in Fig. 7, if desired.In any or all of the arrangements illustrated or suggested, the metalrings Vwill provide a strong reinforcement against any possible pressurethat the liquid could exert on the fabric held between them. It will benoted that more than half of the cylindrical surface 'of the ring andfabric assembly exposed to liquid under pressure is of fabric.

Liquid entering at the inlet d will pass into the fabric wherever asurface or edge is exposed on the interior of the cylindrical assemblyand will flow through and between the fibers and outwardly between themetal rings into the space between the shell 6 and the wall of thechamber I, finally reaching the outlet at 5.

In any of the forms shown, the ring and fabric assembly may be slid downinto the perforated shell 6 and the shell with the element inside maythen be, set into the cylinder I concentrically with the cylinder andwith a shaft I3 which is mounted coaxially of the cylinder for rotationby gears I4 and I5. The top 3 has a suitable bearing IE and a stuiiingbox I1 for the upper end of the shaft.

`A plurality of Scrapers I8, each attachedto a sleeve I9 keyed upon theshaft, have their outer ends in contact with the cylindrical innersurface of the ring and fabric filter assembly. As shown in Figs. l and2, these scrapers are set progressively around the shaft and with aslight overlap longitudinally, so that as the shaft turnscounterclockwise, looking downward from the top, the Scrapers act toscrape the entire inner surface of the assembly. The sludge will drop tothe bottom of the interior of the assembly, which rests upon a plate 20supported in the base 2, and having a central opening for the shaft I3.

The lower surface of the plate 20 is formed with a recess 2| serving asa pump chamber to receive an oscillatory, ring-shaped pump member 22provided with a radially projecting arm 23 which is slidable within aslot in a guide pin the ends of which are pivoted in the plate 25 and inthe plate 25 which lies beneath the plate 23 to form a lower wall forthe recess 2l. he member 22 has flat upper and lower surfaces sliding inclose contact with the smooth sur faces of the plates 20 and 25 and itis oseiliated within the recess 2l by a cam 2% keyed to the shaft I3`and in three-point Contact with the interior of the ring portion of themember 22 through antifriction rollers 2l.

An intake opening 28 seen in Figs. 3 and 4 but not in Fig. 1, is formedin the plate 28 as a passage from the bottom of the chamber within thefilter ass-embly to the pump chamber 2 l. An outlet passage 29 formed inthe plate 25, seen in Figs. 3 `and 5 but not in Fig. 1, connects 'with apassage 30 in the base 2 and leads into the top of a press chamber 3l.

With the parts in the position shown in Fig. 3, the cam 2S has drawn thering member 22 away from the inlet 28 to the opposite side of the recess2| creating a suction, which, aided by the pressure in the chamber l,has caused sludge to move from the inlet into the space opened betweenthe ring and the inlet. This is half of the total space between the ringand the wall of the recess, the other half being filled with fluidsludge which will leave at the outlets 29 and S9 as the rotation of thecam continues to draw in sludge at 28 until the ring covers both theinlet and outlet ports at 180 of movement from the position of Fig. 3.The ring will continue its swinging and sliding movement around theinner wall of the recess, again opening both ports. The arm 23 separatesthe two passages so that the liquid sludge cannot pass the barrierformed by the arm.

The cylindrical press chamber 3i is secured at its upper end to thelower surface of the base 2. A bottom member 32 secured upon the lowerend of the chamber SI has a central bearing 33 for the lower end of theshaft i3 surrounded by discharge openings 34. Within the chamber 3l is aperforated cylinder 35 containing a ring and fabric filter assembly 36similar to that used in chamber l except for size. The arrangement of Vring and fabric is shown as in Fig. 6 but that of Fig. 7 or 8 may beused instead.

A screw 31 with a spiral flange is slidably mounted on the shaft I3, aspline 38 permitting upward movement of the screw on the shaft when thepressure upon the solids in the lower turns of the screw becomes greaterthan the resistance offered by the spring 39. This upward movement ofthe screw on the shaft acts to uncover the discharge openings 34 topermit the escape of solids from which a high percentage of water hasbeen removed and since the resistance to pressure is a function of thequantity of water present in the solids, the discharge will normallyoccur when the desired dryness has been effected. The strength of thespring 39 will be chosen according to the material being pressed out.

The pressure exerted by the pump member 22 will force much of the liquidout at the upper portion of the filter assembly 36 and the pressure ofthe screw will drive the rest out through the portion of the lterassembly opposite the screw. The liquid leaves the screw press chamber3| through an outlet tube 40.

A scraper 6l on a sleeve 42 secured to the shaft I3 will engage theinner surface of the uppermost rings in the assembly and a scraper arm43 on the upper end of the screw 31 will engage the intermediate portionof the lter surface not reached by the scraper 5| or the spiral flange,and since these two Scrapers are keyed to the same shaft on oppositesides, they can never interfere with each other no matter how far upwardmovement of the screw may compress the spring 39.

This invention is primarily designed for use in filtering liquidproduced in the preliminary treatment of malt in the saccharier toproduce sugar and dextrine. All solids that have not been converted intosoluble substances, including any molds present in the malt, will beremoved so that the liquid entering the cooker will be clear and freefrom anything that might be detrimental to the flavor or aroma of thebeer.

It will be understood that the invention is not limited to the detailsof construction and arrangement herein shown and described, but manychanges in form, proportions, and location of parts may be made by thoseskilled in the art without departing from the invention as claimed.

I claim:

Filtering apparatus having a chamber, a filter assembly withinthechamber adapted to receive liquid under pressure, the assemblycomprising a plurality of metallic rings and a tubular fabric permeableto liquid, the rings being set alternately inside and outside of thefabric whereby to impose portions of the fabric between adjacent rings,the rings differing in interior radii by an amount substantially equalto the thickness of the fabric and with the rings of greater interiorradius on the outside, whereby the inner surface of the assembly issubstantially cylindrical with annular portions of the fabric exposed onthe inside, and scraping means movable in contact with the cylindricalinner surface to remove solids therefrom.

FRANK J. FETTE.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 488,583 Sobotka et al Dec, 27,1892 644,207 Kerrinnes Feb. 27, 1900 1,048,853 Muntzing Dec. 31, 19121,137,075 Morris Apr. 27, 1915 1,624,385 Bergen Apr. 12, 1927 1,772,262Naugle Aug. 5, 1930 2,407,046 Vokes Sept. 3, 1946 FOREIGN PATENTS NumberCountry Date 385,590 Great Britain Mar. 24, 1931

